中国物理B ›› 2018, Vol. 27 ›› Issue (1): 17501-017501.doi: 10.1088/1674-1056/27/1/017501

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Influences of La and Ce doping on giant magnetocaloric effect of EuTiO

Zhao-Jun Mo(莫兆军), Qi-Lei Sun(孙启磊), Jun Shen(沈俊), Mo Yang(杨墨), Yu-Jin Li(黎玉进), Lan Li(李岚), Guo-Dong Liu(刘国栋), Cheng-Chun Tang(唐成春), Fan-Bin Meng(孟凡斌)   

  1. 1 School of Material Science and Engineering, Institute of Material Physics, Key Laboratory of Display Materials and Photoelectric Devices of Ministry of Education of Ministry of Education, Key Laboratory for Optoelectronic Materials and Devices of Tianjin, Tianjin University of Technology, Tianjin 300191, China;
    2 School of Material Science and Engineering, Hebei University of Technology, Tianjin 300401, China;
    3 Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
  • 收稿日期:2017-09-01 修回日期:2017-10-02 出版日期:2018-01-05 发布日期:2018-01-05
  • 通讯作者: Zhao-Jun Mo E-mail:mozhaojun@iphy.ac.cn
  • 基金资助:
    Project supported by the National Key Research and Development Program of China (Grant No. 2017YFB0702704), the National Natural Science Foundation of China (Grant Nos. 11504266, 51676198, and 51371075), the Tianjin Natural Science Foundation, China (Grant No. 17JCQNJC02300), and the National Key Foundation for Exploring Scientific Instrument of China (Grant No. 2014YQ120351).

Influences of La and Ce doping on giant magnetocaloric effect of EuTiO

Zhao-Jun Mo(莫兆军)1, Qi-Lei Sun(孙启磊)2, Jun Shen(沈俊)3, Mo Yang(杨墨)2, Yu-Jin Li(黎玉进)2, Lan Li(李岚)1, Guo-Dong Liu(刘国栋)2, Cheng-Chun Tang(唐成春)2, Fan-Bin Meng(孟凡斌)2   

  1. 1 School of Material Science and Engineering, Institute of Material Physics, Key Laboratory of Display Materials and Photoelectric Devices of Ministry of Education of Ministry of Education, Key Laboratory for Optoelectronic Materials and Devices of Tianjin, Tianjin University of Technology, Tianjin 300191, China;
    2 School of Material Science and Engineering, Hebei University of Technology, Tianjin 300401, China;
    3 Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2017-09-01 Revised:2017-10-02 Online:2018-01-05 Published:2018-01-05
  • Contact: Zhao-Jun Mo E-mail:mozhaojun@iphy.ac.cn
  • Supported by:
    Project supported by the National Key Research and Development Program of China (Grant No. 2017YFB0702704), the National Natural Science Foundation of China (Grant Nos. 11504266, 51676198, and 51371075), the Tianjin Natural Science Foundation, China (Grant No. 17JCQNJC02300), and the National Key Foundation for Exploring Scientific Instrument of China (Grant No. 2014YQ120351).

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摘要： Giant reversible magnetocaloric effects and magnetic properties in Eu0.9R0.1TiO3 (R=La, Ce) are investigated. The antiferromagnetic ordering of pure EuTiO3 can significantly change to be ferromagnetic as substitution of La (x=0.1) and Ce (x=0.1) ions for Eu2+ ions. The values of -ΔSM and RC are evaluated to be 10.8 J/(kg·K) and 51.8 J/kg for Eu0.9Ce0.1TiO3 and 11 J/(kg·K) and 39.3 J/kg for Eu0.9La0.1TiO3 at a magnetic field change of 10 kOe, respectively. The large low-field enhancements of -ΔSM and RC can be attributed to magnetic phase transition. The giant reversible MCE and large RC suggest that Eu0.9R0.1TiO3 (R=La, Ce) compounds could be promising materials in low temperature and low magnetic field refrigerants.

关键词: magnetocaloric effect, magnetic entropy change, magnetic phase transformation

Abstract: Giant reversible magnetocaloric effects and magnetic properties in Eu0.9R0.1TiO3 (R=La, Ce) are investigated. The antiferromagnetic ordering of pure EuTiO3 can significantly change to be ferromagnetic as substitution of La (x=0.1) and Ce (x=0.1) ions for Eu2+ ions. The values of -ΔSM and RC are evaluated to be 10.8 J/(kg·K) and 51.8 J/kg for Eu0.9Ce0.1TiO3 and 11 J/(kg·K) and 39.3 J/kg for Eu0.9La0.1TiO3 at a magnetic field change of 10 kOe, respectively. The large low-field enhancements of -ΔSM and RC can be attributed to magnetic phase transition. The giant reversible MCE and large RC suggest that Eu0.9R0.1TiO3 (R=La, Ce) compounds could be promising materials in low temperature and low magnetic field refrigerants.

Key words: magnetocaloric effect, magnetic entropy change, magnetic phase transformation

中图分类号:  (Magnetocaloric effect, magnetic cooling)

  • 75.30.Sg
65.40.gd (Entropy) 75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))